Adjustable tension guide for shuttles



Jan. 17, 1928. 1,656,761

' C. H. SERGESON ADJUSTABLE TENSION GUIDE FOR SHUTTLE'S Filed Jan. 6, 927

WWW/ W Patented Jan. 17, 1928.

CHARLES H. SERGESON, OF PHILADELPHIA, PENNSYLVANIA.

ADJUSTABLE TENSION GUIDE FOR SHUTTLES.

Application filed January 6, 1927.

This invention relates to improvements in loom shuttles, and more particularly relates to improvements in the means for tensioning the yarn delivered by the shuttle.

The yarn-tensioning means, provided with shuttles of the type involved, ordinarily comprises a pair of opposed yarn-engaging elements between which the yarn passes, means being provided for resiliently holding the elements together upon the yarn.

Due to the continuous frictional contact with the yarn, which is drawn between the tensioning elements, the latter become worn and require frequent replacement.

It is the principal object of the present invention to provide novel means for avoiding the necessity of these frequent replacements of the yarn-tensioning elements, and to this end, the invention contemplates the provision of a novel form of yarn-engaging element, having means for relative adjustment thereof with respect to the yarn and to the opposed yarn-engaging element, whereby different parts of the element may be brought into position to engage the yarn. Under these circumstances, when the aforesaid element becomes worn in one place, it may be adjusted to bring an unworn portion of the surface thereof into the yarnengaging position.

In the attached drawings:

' Fig. 1 is a plan view of one end of a shuttle made in accordance with my invention;

Fig. 2 is a section on the line 2-2, Fig. 1;

p and Fig. 3 is a section on the line 8-3, Fig. 1.

Referring to the drawings, the shuttle comprises the usual body portion 1, having therein a chamber 2 for reception of the yarn-eop, andhaving at one end of the chamber 2 a suitable tensioning device comprising, in the present instance, a pivotally mounted yarn-engaging element 3, and a relatively fixed opposed yarn-engaging element 4. Suitable resilient means, such as a spring 5, is mounted in the shuttle so as to exert a pressure on the underside of the element 3, to resiliently hold the latter in an elevated position against the underside of the element 4. It will readily be understood that the yarn, when passing out of the shuttle through an eyelet 6 in the bottom Serial No. 159,321.

of the latter, proceeds through a guide-eyelet 7 in the element 3 and between the latter element and the opposed element 4. V

The element t consists, in the present in.- stance, of a cylindrical pin, extending transversely of the shuttle body. and having at one end a threaded part 8 of increased diameter which is mounted in a correspondingly threaded transverse passage 9 in the shuttle body. The other endof the pin 4 is slidably mounted in a transverse recess 10 in. the said body. Suitable means is provided whereby the pin 4- may be turned to adjust its position in the loom, both longitudinally and angularly, and for this purpose I have provided the threaded extremity witlh a slot 11 for the reception of a suitable too In operation, the drawing of the yarn between the element 3 and the opposed element at has the effect of grooving and wear ing the pin at to such an extent as rapidly to render it unsuitable for the tensioning function. It is necessary, under these circumstances, to drive the usual form of pin from the shuttle and to replace it with a new pin, an operation frequently resulting in damage to the body of the shuttle. In the present instance, the yarn, guided through one or the other of the eyelets 7 in the element 3, may be made to engage the pin 4 at a multitude of different positions on the latter by a simple adjustment of the pin longitudinally, and by changing the angular position of the pin in the shuttle.

The device thus provides a simple and effective means for retaining the tensioning device in perfect working condition, and avoids the necessity for frequent replacement of one of the tensioning elements.

I claim 1. A yarn-tensioning device for loomshuttles, comprising a pivotally mounted yarn-engaging element; an opposed yarnengaging element in the form of a transverse pin; means for resiliently holding said elements together: and means for adjusting said pin both angularly and longitudinally in the shuttle, said pin being less in length than the width of the shuttle to permit longitudinal and axial adjustment of the pin without projecting beyond the faces of the shuttle.

2. In a yarn-tensioning device for 100mshuttles, the combination with a pivoted yarn-engaging element, of an opposed varnengaging element in the form of a cylin- 5 drical pinthreaded in the shuttle; resilient means for holding said pivoted element against the said pin; and means for turning the pin on its axis to adjust it angularly and longitudinally 'in the shuttle, said pin being less in length than the Width of the shuttle to permit longitudinal and axial adjustment of the pin without projecting beyond the faces of the shuttle.

CHARLES H. SERGESON. 

